2009 — 2012
1462cc Liquid-cooled, SOHC, 54-degree V-twin
Petrol
While idling in neutral, listen for any rhythmic clicking or metallic rattling from the top end, as valve lash adjustments are crucial on these V-twins to ensure longevity.
Check the clutch engagement by performing a few controlled launches; if you feel any slip or shudder, it is common to consider the condition of the clutch plates given the bike's high torque output.
While stationary, carefully shift through all gears, specifically checking for any difficulty finding neutral or 'false neutrals', which can occasionally occur in higher mileage units.
Inspect the shaft drive housing for any signs of weeping oil, as the final drive seal is a known wear item that requires attention to keep the rear end running smoothly.
Usually requires a thorough inspection of the throttle body synchronization and a check of the spark plug condition.
Consider a major service which often includes a coolant flush and a comprehensive inspection of the steering head bearings.
Often the time to inspect the condition of the clutch basket and assess the drive shaft components for any play.
Keep a regular eye on engine oil levels, as these liquid-cooled V-twins appreciate being topped up with high-quality synthetic oil.
Check the coolant levels frequently to ensure the cooling system is operating optimally, especially during warmer NZ summers.
Inspect the final drive oil during every second engine oil change to ensure the shaft remains well-lubricated.
Regularly clean and lubricate the throttle cables to ensure the response remains crisp and smooth.
Monitor tyre pressure regularly, as the weight of the M90 makes proper inflation essential for predictable handling.
Estimated repair costs if issues arise
Given the significant torque this engine produces, if the clutch starts to slip after many kilometres of use, you might eventually need to budget for a complete plate and spring replacement.
If you notice a slight notchiness or lack of precision in the steering, it is common to consider replacing the steering head bearings to restore the factory feel.
If the shaft drive shows signs of seepage, a mechanic may need to replace the internal seals. It's a sensible bit of future budget planning to account for this if you see any fluid residue.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer